Duplicating roll spindle



' June 9, 1

s. OFFER 2,043,302

DUPLICATING ROLL SPINDLE Filed 001;. 23, 1935 2 Sheets-Sheet l 'Ellllllil! 45 99%MZZ??? 7 s. OFFER DUPLICATING ROLL- SPINDLE Filed Oct. 25, 1933 I 2 Sheets-Sheet 2 Patented June 9, 1936 PATENT OFFICE DUPLICATING ROLL SPINDLE Samuel Offer, Chicago, 111., assignor to U. S.

Duplicator Company, Chicago, 111., a corpora.-

tion of Illinois Application October 23, 1933, Serial No. 694,698

6 Claims.

of the gelatine band to the roll in such a Way that the attachment of the band to the spindle can be readily made without difiicult manipulation, and so that after the band has been unwound from'the spindle it will automatically release itself from engagement with the spindle without the necessity for special manipulation.

Spindles-of the character here involved are constructed to serve either as the winding spindle or as the delivering spindle, and the present invention is directed primarily to the combined features involved in the formation of the spindle itself and in the attaching end of the band, which are so correlated as to readily and conveniently engage with oneanother when it is desired to apply the band to the spindle and readily disengage when release of the parts is required. a Further objects and details of the invention willappear from the description thereof in conjunction with the accompanying drawings, wherein,- -Figure 1 is a side elevation of a duplicating machine of conventional form embodying the spindles of the present invention;

Fig. 2 is a cross sectional view taken on line 2.2v of Fig. 1, particularly showing the engagement of the chuck end of the spindle with the winding handle;

Fig. 3 .is an enlarged View taken on line 3-3 of Fig.- 2, showing the winding chuck which coacts with the end of the spindle in winding the same;

Fig. 4 is a detail showing the acting inner face of the chuck member;

V i Fig. 5 is an enlarged detail taken on line 5-5 of Fig. 2, showing the means for journalling the opposite end of the spindle;

. Fig. 6 is a perspective view of the spindle wit the attaching end of the gelatine band secured thereto.

Fig. '7 is a similar enlarged view showing the spindle without the band in place; and

Figs. 8, 9 and 10 are cross sectional views taken on line 8 in Fig. 6, showing. the band in various positions of adjustment with relation to the spindle.

The spindle 20 of the present invention may serveeither as thewinding spindle or the delivering spindle, and as shown two of such spindles are employed in a duplicating machine, which comprises a-front side'plate 2| and a rear side plate 22 which are suitably connected by tie rods 23, or in any other conventional manner.

The machine has a bed plate 24 over which the gelatine band 25 is stretched in the usual manner, the spindles operating to draw the band progressively across the surface of the bed in order to expose the portion of the band required to take the impression.

The gelatine band terminates at each end in a tapering section 26 which is preferably formed of suitable fabric, and each of these tapering end sections has inserted therein an attaching strip 21 which is held in place by reversely turning the fabric to furnish a loop 28 which surrounds the strip. The stripis flattened on its inner face 29 and circuniferentially rounded on its upper face 30, the configuration in cross section being that of a cord or section of the cylindrical spindle 2|], and the strip with the surrounding fabric being of a size and shape to fit within the flat bottomed recess 3| formed on one side in the center of the spindle and bounded at its ends by flat end walls 32. The insertion of the strip 21 into the loop in the end of the fabric 26 distends the fabric and affords a stiffening or reinforcement for the end of the strip, so that when the reinforced end is positioned in place within the slot in the spindle, a firm continuous cylindrical surface will be afforded for the winding of the gelatine strip.

In order to hold the parts in place, a stud 33 is provided in the center of the slot which enters an aperture 34 extending through the looped fabric and through the strip 21, said aperture being preferably afforded by the metallic Walls of an eyelet 35, the ends of which are flanged or upset to overlie the fabric and furnish a suitable binding therefor. The parts are so arranged as to fit snugly together when positioned as in Fig. 8, which affords a firm winding surface for the turns of the gelatine band, as indicated in Fig. 9; and Fig. 10 illustrates the manner in which the end of the strip Will release it-' self from engagement with the stud 33 when the band is being wound up on the companion spindle. V V

The body of the spindle is preferably formed of wood and is headed at each end by a cap 36, to the outer face of which is secured an outstanding Z-shaped chuck-engaging member 21, the ends 38 of which extend oppositely to one another and in angular relation to the body of the member. A journal stud 39 projects outwardly from the center of the chuck-engaging member. The chuck-engaging member thus formed is designed to coact with a chuck head 40 on the inner end of a winding shaft 4| which is journalled within a journal plate 42 on the near side of the machine, the same arrangement being duplicated at each end of the machine. Handles 43 are provided for winding the spindles to advance the gelatine band in either direction, as occasion may require, and suitable dog and ratchet mechanism 44 is also employed, as is customary in devices of this character. The chuck head 40 is provided in its face with a cross groove 4'5, in the center of which is a circular bore or recess 46 to receive the journal stud 39. The side faces of the chuck head are squared to fit within the extensions 38 (see Fig. 3).

The opposite end of the spindle has the journal stud 39 journalled within a notch 41 within a fixed plate 48 secured to the inner face of the side wall 22, and the fixed notched plate co-operates with a lever 49 pivoted on a pintle 50. A spring 5| secured to the short arm 52 of the lever serves to hold the long arm 53 elevated in position to hold the journal stud within the notch 41, but the arrangement of the parts permits the journal stud to be withdrawn by depressing the long arm of the lever, as indicated in dotted lines in Fig. 5. The under edge M- of the plate 18 is convexly rounded and merges into the notch 41 in such a way as to afford a throat for the entrance of the journal stud, so that when it is desired to mount the spindle in place, its chuck-engaging end will first be inserted into position while the spindle is standing obliquely with respect to the walls of the machine, after which the opposite end of the spindle will be swung laterally to permit the journal stud to slip into place and journal itself between the fixed journal plate and the spring-pressed lever.

In using the machine, an empty spindle will be positioned in place to serve as the winding spindle, while a loaded spindle carrying the wound up gelatine band will be similarly mounted in position to serve as the delivering spindle. The outer or free end of the band will be drawn forward and hooked on to the stud of the winding spindle. This manipulation is easily accomplished by one hand of the operator, and without close attention, which is an important feature of advantage in a device of this character,

since the position of the spindles beneath the bed of the machine is such that close or accurate manipulation is difficult, and provision must be made to permit the parts to be easily assembled 7 under such adverse conditions.

The present arrangement is one which permits the stiff reinforced and distended end of the band to be easily fitted into place within the recess in the wall of the winding spindle and to be hooked on to the upstanding stud, after which the first turn of the winding spindle in the proper direction will cause the fabric to wind over the firm uniformly cylindrical surface thus presented, so that thereafter the winding will proceed uniformly and without difficulty as the sections of the gelatine band are progressively exposed upon the bed of the machine for use. When the terminus of the band is reached, the band will automatically release itself from the delivering spindle, after which it is completely wound up on the winding spindle for removal from the machine. Removal of the spindles is easily effected, since a moderate tension exerted on the journalled end of the spindle will cause the journal stud to release itself from the spring-pressed journal mounting.

The spindles being interchangeable end for end, either spindle may serve as a winding or delivering spindle, and the invention as a whole is designed with a view of facilitating the operations involved and of affording a firm and truly cylindrical winding surface, so that the winding will be smooth and even and properly centered.

Although the invention has been particularly described as a winding spindle applicable for use in connection with duplicating machines, it is obvious that it might be used in connection with other types of machines or appliances in which it is desirable to afford a detachable connection between the spindle or the strip or sheet wound thereupon.

I claim:

1. In mechanism of the. class described, the combination of a spindle presenting a winding surface of uniform curvature at its ends and from end to end save for the formation of a recess in the medial region, and a band adapted to be wound upon the spindle and having secured to its attaching end a stiff section of reinforcing material configured to fill the recess and. afford a uniformly curved winding surface in continuation of the surface afforded by the spindle.

2. In mechanism of the class described, the combination of a spindle presenting a winding surface of uniform curvature at its ends and from end to end save for the formation of a recess, a band adapted to be Wound upon the spindle and having secured to its attaching end a stiff section of reinforcing material configured to fill the recess and afford a uniformly curved winding surface in continuation of the surface afforded by the spindle, and an attaching stud upstanding from the recessed portion of the spindle, the reinforced attaching end of the band being provided with an aperture adapted to maintain engagement with the stud when the band is wound around the spindle and to freely release therefrom when the band is completely unwound.

3. In mechanism of the class described, the combination of a spindle presenting a winding surface of uniform curvature at its ends and from end to end save for the formation of a recess, a band adapted to be wound upon the spindle and having secured to its attaching end a stiff section of reinforcing material configured to fill the recess when presented from either side of the recess and afford a uniformly curved winding surface in continuation of the surface afforded by the spindle, and the spindle being provided at each of its ends with a chuck-engaging member configured to engage with a winding chuck, and a journal spindle outstanding from the chuck-engaging member and adapted to co-act with a journal bearing to permit either end of the spindle to receive a driving connection.

4. In mechanism of the class described, the combination of a spindle presenting a winding surface of uniform curvature at its ends and from end to end save for the formation of a recess, a band adapted to be Wound upon the spindle and having secured to its attaching end a stiff section of reinforcing material configured to fill the recess when presented from either side of the recess and afford a uniformly curved winding surface in continuation of the surface afiorded by the spindle, and an attaching stud upstanding from the recessed portion of the spindle, the reinforced attaching end of the band being provided with an aperture adapted to engage with the stud when the band is wound around the spindle and to freely release therefrom when the band is completely unwound, and the spindle being provided at each of its ends with a chuck-engaging member configured to engage with a winding chuck, and a journal spindle outstanding from the chuck-engaging member and adapted to coact with a journal bearing to permit either end of the spindle to receive a driving connection.

5. In mechanism of the class described, the combination of an elongated cylindrical spindle having in its center portion a fiat bottomed recess, a stud upstanding from the bottom of said recess, a band having an attaching end of a firm uniformly curved winding surface, and the reinforcing strip being provided with an aperture adapted to engage with the stud when the band is Wound around the spindle and to freely release therefrom when the band is completely unwound.

6. In mechanism of the class described, the combination of an elongated cylindrical spindle having in its center portion a flat bottomed recess, a stud upstanding from the bottom of said recess, a band having an attaching end of reduced Width, and having the end portion thereof lapped to afford a loop, a stiif reinforcing strip entered through said loop and configured to having a flat under surface for contact with the flat bottom of the recess, and having a curved outer surface conformable to the curvature of the spindle surface and constituting a continuation thereof, the parts being adapted when assembled to afford a firm uniformly curved winding surface, and the reinforcing strip being provided with an aperture adapted to detachably engage with the stud, the walls of said aperture being reinforced by an eyelet upset at its ends to clamp the margins of the loop adjacent the aperture.

SAMUEL OFFER. 

